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Which gland produces juvenile hormone in insects?

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Illustration showing a variety of adult insects, each labeled with its common name and order, including walkingstick, earwig, stonefly, tree cricket, dragonfly, female scale, cat flea, thrips, sucking louse, thysanuran, ant, scarab beetle, stinkbug, mosquito, and cabbage butterfly, highlighting their diverse shapes and sizes. — insect An illustration of insect diversity.

In insects, juvenile hormone is produced and secreted by the corpora allata. These are a pair of non-neural endocrine glands located behind the corpora cardiaca, situated near the brain.123

This hormone plays a critical role in insect development by inhibiting metamorphosis, thereby maintaining tissues in a larval or juvenile state until late larval development. In addition to its role in growth and molting, juvenile hormone is necessary for normal egg production in adult females.123